Both 59Hz and 60Hz are translated to 59.94Hz before these values are sent to the driver. This behavior is by design for monitors and TVs that report only 59.94Hz but not 60Hz. However, 59Hz is shown in the Screen refresh rate inControl Panel, even though the user selected 60Hz.
In Windows 7 and newer versions of Windows, when a user selects 60Hz, the OS stores a value of 59.94Hz. The 60Hz setting maintains compatibility for applications that expect 60Hz. The 59Hz setting makes sure that a TV-compatible timing is always available for an application such as Windows Media Center. Therefore, Windows 7 and newer versions of Windows expose two frequencies, 59Hz and 60Hz, for every resolution that is supported at that timing. Specifically, this behavior occurs on monitors that report a TV-compatible timing of 59.94Hz, but not 60Hz.Ĭertain monitors report a TV-compatibility timing of 59.94Hz. On a computer that is running Windows 7 and newer versions of Windows, you cannot change the Screen refresh rate for certain monitors.
